Name
Keuffel & Esser N < 4053 - 5 > Polyphase Mannheim Adjustable Dated 1923
Front Scales
20inch / A = B CI C = D K ] 50cm
Back Scales
= S L T =
Type of Rule
slide rule
Material
Dimension (mm)
Area of Use
generic
Origin of Rule
Michael O'Leary
Match Number
4696
Comment
Thumbnail